Disciples II: Gallean's Return is a compilation edition that includes the base game, Disciples II: Dark Prophecy, plus the two standalone expansions Disciples II: Guardians of the Light and Disciples II: Servants of the Dark.
6 years old but since the graphics are 2D it won't have aged as badly as 3d games from that time.
Disciples II: Rise of the Elves is also $1.62 US: http://store.steampowered.com/app/1630/?snr=1_7_7_204_150_1
Unrelated, by Sins Solar Empire Rebellion is also on sale for $10 (75% off).
http://store.steampowered.com/app/204880/?snr=1_4_4__112
There's an alternative. Pay $4 and get those two Disciples games plus Sacred Gold. Then you're only paying about 75c for that Sacred Gold game. All games redeemable on Steam.
http://store.indiegala.com/index.php/the-sacred-disciples2-b…